WEEK 10 Flashcards
Two samples are related if each observation in one sample is paired with
Correct a single observation in the other sample.
Which one of the following does not illustrate two related samples?
Identical twins are split into two groups.
Schoolchildren are measured before and after the school term.
Marital couples are split into two groups.
Uni students are split into two groups.
Uni students are split into two groups.
Repeated measures usually cause an increase in
the observed mean difference.
the probability of retaining a true null hypothesis.
variability.
Correct none of the above.
none of the above.
Using the same subject in both samples would most likely control for
individual differences.
“When subjects perform double duty in both conditions of an experiment, the order in which conditions are experienced should be”
counterbalanced
A medical researcher compares the blood pressure readings for a group of high-risk patients both before and after the administration of a new tension-reducing drug. The appropriate test would be a
t test for two related samples.
“Grade-school children are randomly assigned to reading groups of either four or eight children throughout the school year. At the end of the school term, scores are obtained for each child on a standardized reading achievement test. The appropriate test (to evaluate any difference between reading group size) would be a”
t test for two independent samples.
“You have decided to conduct a repeated measures experiment to examine whether people smoke more when in the presence of other people. You first observe your subjects when they are smoking alone and then when they are smoking in the presence of others. Before you analyse your findings, you realise that your findings will be biased. Why?”
you should have counterbalanced the order of the treatment conditions
You have sampled some data using a sample size of 15 and you want to calculate the 90% confidence interval of the mean. What critical t* value are you going to use?
1.761
